ELI5 LEGO - why do the bricks still click after decades?

What is Lego’s company motto? What does the word Lego mean? How do lego bricks not lose tension after years of repetitive play? If Lego had a patent on their interlocking bricks, why are there so many copycat versions? How many lego pieces are in circulation? What’s the biggest lego set? ... we explain like I'm five Thank you to the r/explainlikeimfive community and in particular the following users whose questions and comments formed the basis of this discussion: madeleinedean, 080087, option8, squeevey, laeiryn and gragert. To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Send us an e-mail: [email protected]